I'm trying to find info as well. I have a Ida Maria Grassi alto, number 24467 on the back. I got it from my cousin who used it band in the 80's.
Pan American and Conn Stencil saxophone serial number charts have been attempted by a couple folks, but they never seem to be completed. I've advocated the, 'Well, if your P-A is serial #12,345 and has single-side bell keys, add 67,890 to it and then look at the pro Conn chart.' I stopped advocating this because it works about as well as me saying that a single-side bell key P-A was made in the 1940's. If you know of a.posted. complete or even partially complete chart, I'd be more than happy to link to it! Unfortunately, as mentioned, I have other source material that says that Malerne was purchased by SML, not by Buffet. My information.
Came from SML. I try not to get into a shouting match with other people and their histories.
Primarily because I'd be willing to be that Mr. Ray can whip out a bunch of references where he got his info and so can I. And, y'know, it really doesn't matter. The only time it does matter is if I say that, say, your Jean Cartier saxophone was made by Rampone (or something) and it's obviously a Dolnet. Black or white: I'm either wrong or right.
If I ever post a 'complete' history of Malerne, I'll contact Mr. Ray and get his input, but considering they don't seem to have ever produced their own professional saxophones (clarinets, etc. Are a different story), I'm not as interested in Malerne as other manufacturers. Serial numbers, definitely.